My faucet is only producing very Hot water but there is no sign of clod water coming out of the faucet I think I have the Legend Moentrol. Why do you think my cold water is not working is it the cartridge or a line that is clogged.

Sounds like you disturbed some mineral built up in the pipe walls and now it's clogging your ports.
Shut the water off to the valve and open it up./ Remove the cartridge and check and clean the inlet ports. Now turn the cold water back on to flush out the supply. Reassemble and test, At the bottom of the page click to bring up a diagram Good luck, Tom